Adjustable pattern.



T. W. SPELLMAN.

ADJUSTABLE PM'TEHN.

APPLICATION FILED JAN. 4, 1918.. LWLQM Fatentedl 3311.14,!919.

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ADJUSTABLE PATTERN.

APPLICATION FILED JAN. 4. I918,

Patented Jam. 1 1919.

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I T. W. SPELLMAN. ADJUSTABLE PATTE APPLICATION FILED IAN.4, 1a.

1 91,221 Patented Jan. 14, 1919.

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ADJUSTABLE PATTERN.

Application filed January l, 1918.

To all whom it may concern:

Be it known that 1, THOMAS W. SPELL- MAN, a citizen of the UnitedStates, residing at Worcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Adjustable Pattern, ofwhich the-following is a specification.

This invention relates to a pattern designed particularly for castingpipe joints or fittings.

The principal objects of this invention are to provide a construction inwhich the parts of the pattern can be relatively adjusted so as topermit of the casting of several different pipe fittings from a singlepattern, thus eliminating a great amount of pattern mak-, ing andfacilitating the production of castings of this character; to provide aconstruction in which a single pattern can be used to form astraight-way fitting or an elbow at ninety degrees or any other ordinaryangle, or a three-part pattern can be used to cast an ordinary T, a Y orany other fitting having three branches, no matter what the angles, insuch a way that the usefulness of the adjustable pattern will not belimited to any particular angles, but spe cial fittings, even those ofan angle very seldom used, can be made with the same facility asordinary Ts and elbows.

The invention although capable of use for pipe fittings of various kindsand other castings, is particularly useful in connection with the kindsof pipe fittings that are used for making stair rails or the like. It isto be understood, also, that it is. not limited to two'and three wayfittings, but can be used for those having a larger number. When afour-way fitting is used the adjustment is universal in the sense thatthe opposite branches do not have to be in alinement with each other.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which Figure 1 isa plan of a twoway pipe fitting pattern constructed in accordance withthis invention the parts being broken away to show interiorconstruction;

Fig. 2 is an edge view of the same partly Specification of LettersPatent.

Patented J an. ME, 1919..

Serial No. 210,276.

in section with the two half patterns shown slightly separated; I

Fig. 3 is a plan of the lower half as indicated by the line 3-3 of Fig.3;

Fig. 1 is a plan of a three-way pattern constructed in accordance withthis invention;

Flg. 5 1s a sectlonal view on the 1111s 5-5 of F1g. 4,

Fig. 6 is a view of a two-part core for use in connection with atwo-part pattern like that shown in the first three figures, and Figs. 7and 8 are sectional views on the lines 77 and 8-8 respectively of Fig.4.

In the form shown in the first three figures a pattern is illustrated intwo parts, one A to go in the cope and the other B, in the drag. Eachpart is made up of two elements. One element of the part A comprises acentral circular or spherical portion 12 having an arm 13 showncylindrical in this case but constituting part of the pattern proper andtherefore of course shaped in accordance with the casting to beproduced, and this is provided with a core-print 14;. The members 12, 13and 14 are fixed relatively to each other and constitute one element ofthe pattern. The portion 12 may be spherical or not, but is necessarilycircular in its general shape and is provided with a pivot 15 at itscenter shown in the form of a screw. On this is pivoted a circular plate16 which constitutes a part of the other element of the pattern and isfixed with respect to another arm 17 corresponding with the arm 13 and acore-print 18. The arm 17 is provided with a spherical seat 19 forreceiving the surface of the spherical portion 12, and the arm 13 isalso provided with a spherical or circular seat 20 for receiving theedge of the plate 16 and fitting the same. The edge of the plate 16 inthe form shown constitutes a continuation of the spherical surface ofthe central portion 12.

It will be obvious that the two elements of the half pattern will becapable of swinging about the pivot 15 as a center relatively to eachother so as to form a straight-way pattern as shown in Fig. 1 in fulllines, a ninety degree elbow or a fitting with the 1 members.

two elements making some other angle with each other as indicated indotted lines. The other half B of the pattern is of the sameconstruction and need not be described in detail.

Another feature shown in Fig. 3 is a scale on the plate 16, the flatside of the cor- In the form shown in Figs. 4 and 5 the same situationprevails, except that here I have shown a three-way pattern and in thiscase there is a different kind of cooperation between the cope and dragportions of the pattern. Each half of the pattern is not complete initself in this case because some of the portions are made detachablewith respect to the other parts of the same half. In this case thespherical or circular central part is made up of four members 21, 22, 23and 24:, the parts 241 and 23 corresponding in a general way to theparts 12 in the first three figures and the parts 21 and 22 to the twoparts 16. Each one of these members 21, 22, 23 and 24 has a half patternof one of the arms or branches integral with it. For example, in theform shown this plate 22 has an integral half member 26 on the lowerhalf ofzthe pattern, while the plate 21 has an integral portion 25 onthe upper half. The members 23 and 2t each have an integral arm 28. Itis to be observed that although there are only three arms to thispattern there are four integral half arms connected with the fourcentral This leaves two of the half arms 29 and 30 disconnected fromthem. These are provided with the necessary spherical seats for thecentral portion of the pattern and are simply held to theircorresponding half arms 25 and 26 by dowel pins in the usual way. Theyhave to be drawn sepa rately unless temporarily fixed to the centralpart of the pattern. A central pivot pin 31 is used.

A special form of baked sand core is employed comprising a centralcircular or spherical section 35 and a print 36 integral with it with asecond print 37 detachable from it for a two Way fitting. If a three orfour way fitting is to be made the number of detachable core members 37to seat in the prints is correspondingly increased.

Vith this invention the movable parts of the pattern are capable ofbeing adjusted to anyangle that may be necessary and no reallydetachable pieces are required to com plete the pattern when any of thekinds of adjustments are made. The pattern, therefore, iscomplete initself and this is an important feature in this industry becausedetachable portions of patterns constitute an expensive feature inmolding and increase the possibility of error.

Although I have illustrated. and described only two forms of theinvention I am aware of the fact that modifications can be made thereinwithout departing from the scope of the invention as expressed in theclaims. Therefore, I do not wish to be limited to all the details ofconstruction herein shown and described, but what I claim is:-

1. An adjustable pattern for a pipe fitting consisting of cope and dragmembers earh comprising a central hemi-spherical portion constitutingpart of the ball portion of the pattern having two members in each halfof the pattern centrally pivoted together, and an arm integral with eachof the said central portions and adapted to swing about the pivotalcenter therewith, said arms forming with said central portions theentire pattern surface in all positions, and core prints extending fromthe ends of said arms.

2. An adjustable two-part pattern for a pipe fitting comprising acentral spherical portion constituting part of the ball having twomembers with partially spherical surfaces in each half of the patterncentrally pivoted together, an arm integral with each of said membersand adapted to swing about the pivotal center therewith, said armsforming with said members the entire pattern surface, and core printsextending from the ends of said arms in each half of the pattern, one ofsaid arms having a partially spherical socket on its inner end fittingclosely the spherical surface of the other of said members.

In testimony whereof I have hereunto aflixed my signature.

THOMAS V. SPELLMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

